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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 68 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  6. 6.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  7. 7.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  9. 9.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  10. 10.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  22. 22.An angle measures 140°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  23. 23.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  24. 24.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 20° and 80°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  28. 28.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  29. 29.An angle measures 105°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  30. 30.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?

Answer key

  1. 160
  2. 180
  3. 135
  4. 120
  5. 30
  6. Obtuse
  7. 150
  8. 100
  9. Acute
  10. 75
  11. 60
  12. 100
  13. 30
  14. 55
  15. 35
  16. 65
  17. 35
  18. 50
  19. 55
  20. 150
  21. 150
  22. Obtuse
  23. Straight
  24. 125
  25. 160
  26. 80
  27. 20
  28. Acute
  29. Obtuse
  30. 80
  31. 60
  32. 130
  33. 60
  34. 65
  35. 40
  36. 120
  37. 45
  38. 90
  39. 70
  40. 85

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